Thanks ladies...the bubbles on my arm are broken so it keeps leaking fluided which is the reason I think it spreading.
Poison ivy doesn't spread through the fluids (they are due to your body's immune response), so unless you still have some of the PI oil somewhere (on body, clothes, gardening tools, shoes, pets) it won't spread, and your fluids can't give it to someone else (I read up on PI a couple of years ago, because it's good to know your enemy, LOL!).
For home remedies, a poultice made of baking soda can help relieve the itch.
Good old calamine lotion helps (but it's a bright pink color, and not very subtle!)
Jewelweed is supposed to be an herbal remedy for it. I bought some jewelweed soap and cream and spray earlier this year, and am now using it on my PI (I have a patch on my arm...and it seems it's just going to be there, which is great news for me, as I have had systemic reactions to the stuff in the past years, and just touching it with my foot, for example, will have it showing up all over my body).
I have a big bandaid on mine. I think it's a good idea, to keep from scratching it (one potential bad consequence from PI is infection from scratching the open sores).
If you find you are getting more spots of PI (your body reacting to the initial contact, or still being exposed through contact with something carrying the oils), you might have to take prednisone (I've had to do that three years in a row), which will stem the body's immune response. Definitely consider it if the PI gets on your face, especially near the eyes.